Auxiliary pipe loading device

ABSTRACT

A pipe handling device with an auxiliary pipe loading device for use with a horizontal boring machine is disclosed. The auxiliary pipe loading device includes an auxiliary pipe receiving member that is connected to a pipe handling assembly at a location remote from the boring machine. The pipe receiving member is adapted to receive and support a pipe section when the pipe handling assembly is retracted such that the auxiliary pipe receiving member is positioned beyond the magazine of the pipe handling device. The auxiliary pipe receiving member is pivotally connected to a lockout assembly that is operable between a closed position and an open position. In the closed position, the lockout assembly prevents a pipe section from entering the auxiliary pipe receiving member. Whereas in the open position, the lockout assembly permits a pipe section to be manually placed in the auxiliary pipe receiving member. Additionally, an axial stop is provided as a mechanical guide for properly aligning the pipe section axially with the magazine.

FIELD OF THE INVENTION

[0001] This invention relates to the handling of pipe for a horizontal boring device or other machine using or requiring the receipt of pipe in a generally horizontal position.

BACKGROUND OF THE INVENTION

[0002] In recent years, many utility lines have been laid or replaced by use of a horizontal boring or drilling machine which eliminates the need to dig a trench from the surface to install or replace the utility. This technique has generally come to be known as trenchless technology.

[0003] In a typical horizontal boring operation or a horizontal drilling operation, as it may alternatively be called, a bore hole is formed through the soil with a steerable bit connected to a drill string 131. The bore hole is commonly used to pull in a utility service such as an electric cable or a water line. The boring machine is mounted at the surface. One hydraulic motor on the boring machine causes the drill bit and drill string 131 to rotate while another thrusts the drill bit and drill string 131 forward as the bore is formed. It is also common to backream the bore with the machine, rotating a backreaming tool while drawing back the drill string 131 to the boring machine.

[0004] The drill string 131 is formed of a plurality of individual pipe sections threaded together. As the machine initially bores the hole, additional pipe sections must be added or “made up” as the bore is lengthened. The pipe sections are added from a magazine adapted to store a plurality of pipe sections. The pipe sections are transported from the magazine by a pipe handling device to the boring machine to form the drill string 131.

[0005] However, at times, while performing a bore with the boring machine, the magazine may be consumed such that all pipe sections will be used in the bore. When this occurs, a number of additional pipe sections may be required to complete the bore. One typical method for current pipe handling devices require that the empty magazine be removed from the drilling machine and another magazine with additional pipe sections be installed. This requires the use of additional equipment such as a tractor with a backhoe attachment to physically handle and replace the heavy magazine. This additional equipment is costly and may not be readily available at all times resulting in a delay in completing the job. Additionally, only a small number of additional pipe sections may be required to complete the bore, thus making it even less cost efficient to replace the entire magazine.

[0006] The invention of the U.S. Pat. No. 6,085,852 discloses a device that permits the operator to manually load and unload pipe sections without removing the magazine from the pipe handling device during boring and backreaming respectively. In this invention, the pipe holding mechanism of the pipe handling device is retracted to a position past the farthermost column of the magazine in order to manually load or unload pipe sections from the horizontal boring machine during boring and backreaming respectively. However, the device of U.S. Pat. No. 6,085,852 requires a large workspace area to provide for the retraction of the pipe holding mechanism beyond the farthermost column of the magazine.

[0007] The present invention provides a mechanism for removing the additional pipe section from the horizontal boring machine in a compact work space. Additionally, the present invention provides a simple mechanism to easily manually load or unload an individual pipe section to or from the magazine, using the pipe handling assembly. In the case of adding a pipe section, the pipe section may be added to an empty magazine or to a selected magazine column using the present inventive device. The boring machine operator can then operate the pipe handling device to deliver the added pipe section to the drilling machine. Yet, other times it may be desirable to remove only a particular pipe section from the drill string 131 when the magazine is full or from the magazine to accommodate storage of additional pipe sections that are “broken out” from the drill string 131. This can be accomplished in a cost effective manner using the present invention and without emptying the entire magazine as will be discussed. The present invention may be used with a pipe handling system such as that disclosed in U.S. Pat. No. 6,085,852, entitled Pipe Handling Device and issued Jul. 11, 2000, the contents of which are incorporated herein by reference.

SUMMARY OF THE INVENTION

[0008] In one aspect the invention relates to a pipe handling assembly for use with a horizontal boring machine having a spindle axis and a magazine having a lower portion having a discharge outlet formed therein. The pipe handling assembly comprises a transfer member, a pipe holding member and an auxiliary pipe receiving member. The transfer member has a first end and a second end, wherein the second end is remote from the spindle axis.

[0009] The pipe holding member is operatively connectable to the first end of the transfer member and is adapted to transport a pipe section between the discharge opening of the magazine and the spindle axis of the horizontal boring machine. The auxiliary pipe receiving assembly is operatively connectable to the transfer member and is adapted to transport a pipe section on a delivery path between a magazine position and an auxiliary position.

[0010] In the magazine position the auxiliary pipe receiving assembly is positionable at the discharge opening of the magazine column to load and unload a pipe section to and from the magazine column. Whereas, in the auxiliary position the auxiliary pipe receiving assembly is positionable beyond an outer border of the magazine remote from the spindle axis to load and unload a pipe section to and from the auxiliary pipe receiving assembly.

[0011] In another aspect, the invention is a horizontal boring machine system to operate a variable length drill string 131 comprising a plurality of pipe sections. The horizontal boring machine system comprises a boring machine, a drive system, and a pipe handling assembly. The boring machine has a spindle defining a spindle axis and is operatively connectable to the drive system. The drive system is supported on a frame to operate the variable length drill string 131.

[0012] The pipe handling assembly is adapted to add and remove pipe sections from the drill string 131 and comprises a magazine, a transfer member, a pipe holding member, and an auxiliary pipe receiving assembly. The magazine defines a plurality of columns to store and supply the plurality of pipe sections and has at least one discharge opening through which the pipe sections are released by gravity. The transfer member has a first end and a second end and is adapted to operatively move pipe sections along a delivery path between the spindle axis and an auxiliary pipe receiving area beyond an outer border of the magazine column farthermost from the spindle axis.

[0013] The pipe holding member is operatively connectable to the first end of the transfer member and is adapted to transport a pipe section along the delivery path between the discharge opening of a selected magazine column and the spindle axis. Whereas, the auxiliary pipe receiving assembly is operatively connectable to the transfer member and is adapted to receive and transport a pipe section along the delivery path between the discharge opening of the selected magazine column and the auxiliary pipe receiving area.

[0014] In yet another aspect, the invention is a method for handling a plurality of pipe sections to make-up/break-out a drill string 131 at a boring site with a horizontal boring system having a spindle axis and a pipe handling assembly. Each method step is listed as a new sentence below and the method comprises the following. The plurality of pipe sections are stored in plural columns of a multiple-column magazine. A single pipe section is discharged from a magazine column nearest the spindle axis and transported to the spindle axis by a pipe holding member operatively connectable to a first end of a transfer member of the pipe handling assembly.

[0015] The transported pipe section is added to the drill string 131 of a horizontal boring machine. The preceding two steps are repeated until all pipe sections have been emptied from the magazine column nearest the spindle axis. The preceding three steps are repeated with one or more additional magazine columns, with the sequence by which columns are emptied defining a column emptying order from the column nearest the spindle axis to the column farthermost from the spindle axis.

[0016] A pipe section is added to a selected magazine column from an auxiliary pipe receiving area beyond an outer border of the farthermost magazine column by an auxiliary pipe receiving assembly operatively connectable to the transfer member of the pipe handling assembly. The pipe section added to the selected magazine column by the auxiliary pipe receiving assembly is transported to the spindle axis using the pipe holding member at the first end of the transfer member. The preceding two steps are repeated until all the required pipe sections are added to the drill string 131.

[0017] A pipe section is removed from the drill string 131 of the horizontal boring machine. The removed single pipe section is transported from the spindle axis to the magazine column which is last in the column emptying order and stored in that column. The preceding two steps are repeated until all pipe sections which had been removed from the last column in the column emptying order have been replaced. The preceding three steps are repeated with one or more additional selected columns, with the sequence in which columns are refilled defining a sequence which is the reverse of the column emptying order.

[0018] The pipe sections are emptied from the magazine column closest to the spindle axis. The preceding step is repeated until the desired number of magazine columns are empty. A pipe section is removed from the drill string 131 of the horizontal boring machine. The removed single pipe section is transported from the spindle axis to a selected magazine column using the pipe holding member. The pipe section is transported from the selected magazine column to the auxiliary pipe receiving area using the auxiliary pipe receiving assembly. The preceding three steps until all pipe sections are removed from the drill string 131.

BRIEF DESCRIPTION OF THE DRAWINGS

[0019]FIG. 1 is an exploded perspective view of a preferred embodiment of the pipe handling assembly with the auxiliary pipe receiving assembly of the present invention.

[0020]FIG. 2 is a partly cross-sectional end view of the pipe handling assembly of FIG. 1 illustrating the auxiliary pipe receiving assembly at the magazine position.

[0021]FIG. 3 is a partly cross-sectional end view of the pipe handling assembly of FIG. 1 illustrating the auxiliary pipe receiving assembly at the auxiliary pipe receiving position.

[0022]FIG. 4a is fragmented, end view of the auxiliary pipe receiving assembly with the lockout system in the closed position.

[0023]FIG. 4b is fragmented, end view of the auxiliary pipe receiving assembly with the lockout system in the open position.

[0024]FIG. 5 is an exploded view of the lockout system and the transfer arm of the present invention.

[0025]FIG. 6 is a side elevational view of the pipe handling assembly of FIG. 1 showing the operation of the pipe return assembly.

[0026]FIG. 7 is a side elevational view of the pipe handling assembly of FIG. 1 showing the placement of rollers for preventing axial sliding of pipe sections during transport between the spindle axis and the magazine.

[0027]FIG. 8 is a partly cross-sectional end view of a pipe handling assembly with an arcuate shaped pipe transfer member with the auxiliary pipe receiving assembly of the present invention.

[0028]FIG. 9 is a side view of a pipe handling device with a boring machine in accordance with the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] Turning now to the drawings in general and to FIGS. 1, 2 and 9 in particular, there is shown therein a preferred pipe handling device with an auxiliary pipe receiving assembly in accordance with the present invention. The pipe handling device is adaptable for use with any machine or equipment requiring the use or receipt of elongate objects in a generally horizontal position. In the preferred embodiment, the pipe handling device, designated generally by the reference numeral 10, comprises a magazine 12 and a pipe handling assembly 14. The pipe handling assembly 14 in turn comprises a transfer member 15, an auxiliary pipe receiving assembly 16 and a pipe holding member 17 as will be described in detail later. The pipe handling device 10 may be positioned adjacent the frame of a horizontal boring machine 18, as illustrated in FIG. 2, for storing and laterally transporting pipe sections 20 between the pipe handling device and the horizontal boring machine. The pipe handling device 10 is adapted to shuttle pipe sections 20 between an auxiliary pipe receiving area 22 (FIG. 3) and a spindle axis 24 of the horizontal boring machine 18 in a generally horizontal position in a manner yet to be described.

[0030] With continued reference to FIGS. 1, 2 and 9 in the preferred embodiment, the pipe handling device 10 is adapted to be mounted to the horizontal boring machine 18 via a mounting assembly 26. The mounting assembly 26 facilitates accurate alignment of pipe section 20 with the horizontal boring machine 18 and removably connects a frame 28 of the pipe handling device 10 to the horizontal boring machine. It may be noted that in the preferred embodiment fasteners such as pins 32 are used to removably connect the pipe handling device 10 with the boring machine 18 and with an adapter 34 to allow accurate alignment of the pipe handling device with the spindle axis 24. However, any other mechanism that will permit the proper alignment of the pipe handling device 10 with the spindle axis 24 may be used. Thus, the pipe handling device 10 in the preferred embodiment is easily removable from the horizontal boring machine 18 for transport and yet is easily connectable in ready alignment with the spindle axis 24 upon the next use.

[0031] In the preferred embodiment as illustrated in FIGS. 1-9, a magazine 12 stores a plurality of pipe sections 20 in a manner yet to be described. The pipe holding member 17 receives pipe sections 20 from the magazine 12 and transports the pipe sections to the spindle axis 24 of the horizontal boring machine 18 also in a manner yet to be described. Additionally, the auxiliary pipe receiving assembly 16 operates in conjunction with the pipe holding member 17 to supply additional pipe sections from the auxiliary pipe receiving area 22 to the spindle axis 24 in a manner yet to be described.

[0032] With reference now to FIGS. 1 and 2, preferably, the magazine 12 is situated directly above the frame 28 and is removably connectable therewith. The magazine 12 preferably defines a lower portion 52 and a plurality of pipe receiving columns 54. This configuration accommodates a plurality of pipe sections 20 which may be stacked in columns of generally horizontal pipe inside the magazine 12. The columns 54 preferably are formed by a pair of opposing ends 56 and 58 defining a plurality of vertical storage structures 60. The vertical storage structures 60 in the opposing ends 56 and 58 correspond to create tracks for receiving the ends 70 and 72 of a pipe section 20 as shown in FIG. 1. The number of columns 54 in the magazine 12 is dependent upon the number of vertical storage structures 60 formed in the opposing ends 56 and 58.

[0033] With reference now to FIG. 6, preferably, the magazine 12 may further comprise a handle 78. In the preferred embodiment, the opposing ends 56 and 58 comprise a plurality of recesses 80 adapted to receive a sling-type handle 78. The handle 78 permits the magazine 12 to be lifted and transported. Thus, it will now be appreciated that the magazine 12 is removable and transportable, while the frame 28 remains in an aligned position with respect to the spindle 24 of the horizontal boring machine 18.

[0034] With reference to FIG. 1, in the preferred embodiment, the magazine 12 may be removed from the frame 28 while either empty or loaded with pipe sections 20. If removed while loaded, pipe sections 20 may be prevented from falling out of the magazine 12 through the open bottom 52 by retaining pin 150 s 90. Retaining pin 150 s 90 are received through apertures 92 and 94 formed in the opposing ends 56 and 58.

[0035] It will now be appreciated that the magazine 12 efficiently stores pipe sections 20 in generally vertical columns 54 and that the pipe sections are accessible through the lower portion 52 of the magazine that defines at least one discharge opening 95 (FIGS. 2-3) that permits the pipe sections 20 to be loaded and unloaded to and from the magazine in a manner yet to be described.

[0036] As illustrated in FIGS. 1, 2 and 5 in the preferred embodiment, the pipe handling assembly 14 is situated directly beneath the lower portion 52 of the magazine 12. As stated earlier, the pipe handling assembly 14 comprises at least one transfer member 17 movably supported on the frame 28, a drive assembly 98 for driving the movement of the transfer member, the pipe holding member 15 and the auxiliary pipe receiving member 16 in a manner yet to be described the drive assembly 98 drives the movement of the transfer member 17 on a delivery path between the spindle access 24 and the auxiliary pipe receiving area 22. The transfer members 17 may be planer, arcuate, or any other shape that can still permit the transfer member to function as below. The transfer members 17 comprise a first end 100 and a second end 102 remote from the spindle ax is 24. The first end 100 of the transfer member 17 is operatively connectable to the pipe holding member 15 that is structurally linked to the transfer member in a manner yet to be described. The pipe holding member 15 is linked to the transfer members 17 at a location proximal the horizontal boring machine 18. The pipe holding member 15 is adapted to receive and support a pipe section 20 in order to transport the pipe section between the discharge opening of the magazine and the spindle axis 24 of the horizontal boring machine 18. The pipe holding member 15 may further comprise a retaining structure 110 for retaining a pipe section 20 in the pipe holding member. In the preferred embodiment, each retaining structure 110 comprises a spring loaded pipe retainer operatively connected to the transfer member 17 via a spring 112. Retaining structure 110 retains the pipe section 20 in the pipe holding member 15 until the pipe section 20 is aligned with the spindle axis 24. Other retaining structures 110 such as a hydraulic gripper can also be used.

[0037] In the preferred embodiment, as illustrated in FIGS. 1-3, the transfer members 17 are positioned on the frame 28 in a manner generally parallel with each other. The transfer members 17 are advanced and retracted laterally and generally perpendicular to the spindle axis 24 of the horizontal boring machine 18 in such a manner as to shuttle pipe sections 20 between the horizontal boring machine and beyond the magazine 12 to the auxiliary pipe receiving area 22. The extension and retraction of the transfer member 17 is powered by the drive assembly 98.

[0038] The drive assembly 98, illustrated in FIGS. 1-3 preferably comprises rack and pinion gear assemblies mounted on the frame 28. The rack and pinion gear assembly is operatively connected to each transfer member 17 and comprises a pinion gear 114 and a gear rack 116. The rack 116 and pinion 114 gears are mounted in parallel on a shaft 118 which is rotated by a hydraulic motor 120.

[0039] In the preferred embodiment, the shaft 118 is mounted on the frame 28 generally parallel to the spindle axis 24 of the horizontal boring machine 18. The shaft 118 is rotated by the hydraulic motor 120 mounted at one end of the frame 28 (see FIG. 1). The pinion gears 114 are mounted in parallel on the shaft 118 beneath the transfer member 17. Gear racks 116 are welded to the transfer members 17.

[0040] Preferably, operation of the hydraulic motor 120 rotates the shaft 118, which in turn causes the pinion gears 114 to rotate. As shown in FIG. 2, the rotating pinion gears 114 engage the gears racks 116. When the pinion gears 114 rotate in a counterclockwise direction, the transfer members 17 extend laterally in the direction of the horizontal boring machine 18, designated in FIG. 2 as direction X, thereby transporting a pipe section 20 to the spindle axis 24. The pinion gears 114 may be rotated in a clockwise direction to cause the pipe holding member 104 to retract in direction Y (FIG. 3), to enable return of a pipe section 20 to the magazine 12. Additionally, the pinion gears 114 may be rotated further in a clockwise direction to cause the second end 102 of the transfer member 17 to retract to the auxiliary pipe receiving area 22 beyond an outer border 122 of the magazine column 54 farthermost from the spindle axis 24 as illustrated in FIG. 3 for reasons that will become obvious later.

[0041] It may be noted that any other drive assembly 98 that is capable of extending and retracting the transfer member 17 may be employed. For example, a hydraulic cylinder 124 as illustrated in FIG. 8 to drive the transfer member 17 between the spindle axis 24 and the auxiliary pipe receiving area 22 may be used.

[0042] With reference to FIGS. 2 and 3, in the preferred embodiment, the transfer members 17 comprise a pipe blocking member 126 between the first end 100 and the second end 102 of the transfer member. The pipe blocking member 126 has an oversurface 128 that contacts with the pipe sections 20 at the lower portion of the magazine 12 and selectively blocks the discharge of the pipe sections from the magazine columns 54. The oversurface 128 may have a wear protection coating in order to prevent excessive wear of the oversurface.

[0043] In the preferred embodiment, the pipe handling assembly 14 preferably further comprises rollers 130, as shown in FIG. 7, to prevent axial sliding of the pipe section 20 while positioned in the pipe holding member 104. When in a normal operating position, the spindle axis 24 is at an angle of approximately ten to twenty degrees with respect to the ground. The pipe handling device 10 is aligned with the spindle axis 24 of the horizontal boring machine 18. Consequently, pipe sections 20 are delivered to and from the spindle axis 24 on an inclined plane. At this angle, pipe sections 20 may slide axially in the pipe holding members 104. To prevent axial sliding, rollers 130 may be supported on the pipe handling device 10 adjacent the pipe holding members 104. The rollers 130 are preferably comprised of a resilient compound which creates a frictional force with the pipe section 20 in the pipe holding member 104, thus creating resistance to slippage. The rollers 130 allow rotation of the pipe section 20, which is necessary to connect and disconnect the pipe from the horizontal boring machine 18, yet offer sufficient resistance to axial sliding due to their composition. However, it may be noted that any other device that prevents axial sliding of a pipe section 20 in the pipe holding member 15 may be used in place of the rollers 130.

[0044] Turning now to FIGS. 2 and 3 it will be noted that to receive a pipe section 20 from the magazine 12, the transfer members 17 of the pipe handling assembly 14 are retracted to position the pipe holding member 15 beneath the selected column 54 from which a pipe is to be received. Generally, pipe sections 20 first will be retrieved from the column 54 proximal the horizontal boring machine 18 until this column is empty. Thereafter, pipe sections 20 will be retrieved from the immediately adjacent column 54 until it also is empty. Retrieval of pipe sections 20 will proceed in the same fashion until all columns 54 are empty or until the boring operation is completed.

[0045] In the preferred embodiment, after selecting the desired column 54, the transfer members 17 are retracted to position the pipe holding member 15 beneath the selected column. The transfer members 17 are advanced in direction Y by the gear racks 116 and the pinion gears 114. As the transfer members 17 recede from beneath the desired column 54, gravity causes the pipe section 20 positioned at the discharge opening 95 of the selected column to fall into the pipe holding member 15. The retaining structure 110 is supported by the frame 28 while the transfer members 17 are in the retracted position beneath the selected column 54. The retaining structure 110 prevents the pipe section 20 from rolling off of the pipe holding member 15.

[0046] Preferably, the transfer members 17 are advanced to the spindle axis 24 for connection of the pipe section 20 in the pipe holding member 15 with a drill string 131 (not shown) of the horizontal boring machine 18. The horizontal boring machine 18 is then operated to connect the pipe section 20 to the drill string 131 on the horizontal boring machine. Boring operations may then resume and the above procedure is repeated until all the pipe sections 20 from the magazine 12 have been added to the drill string 131. At this point if only a few additional pipe sections 20 are required to be added to the drill string 131, the operator will, instead of adding a new magazine, employ the auxiliary pipe receiving assembly 16 to add the additional required pipe sections to the drill string 131 as follows.

[0047] With reference now to FIGS. 2 through 4, there is illustrated a preferred embodiment of the auxiliary pipe receiving assembly 16. In the preferred embodiment, the auxiliary pipe receiving assembly 16 is operably connectable to the transfer member 17 between the first end 100 and the second end 102 of the transfer member. The auxiliary pipe receiving assembly 16 is adapted to transport a pipe section 20 on a delivery path between a magazine position 142 (FIG. 2) and an auxiliary position 144 (FIG. 3) wherein the delivery path comprises at least one straight line segment. In the magazine position 142 the auxiliary pipe receiving assembly 16 is positionable at the discharge opening 95 of the magazine column 54 to load and unload a pipe section 20 to and from the magazine column whereas in the auxiliary position 144, the auxiliary pipe receiving assembly is positionable beyond the outer border 122 of the magazine 12 remote from the spindle axis to load and unload a pipe section 20 to and from the auxiliary pipe receiving assembly 16. The auxiliary pipe receiving assembly 16, preferably comprises a pipe receiving chamber 136, and a lockout system 138 operatively connectable to the pipe receiving chamber as will be discussed herein.

[0048] The auxiliary pipe receiving assembly 16 is designed to allow additional pipes to be more easily added when pipe columns 54 are empty of pipe sections 20 and additional pipe sections are required to complete the bore. Typically, additional pipe sections 20 are added to the outermost column 54 of the magazine 12 that is farthest away from the spindle axis 24. However, alternative designs could be employed that include other pipe columns 54 to add the additional pipe sections 20 to the interior of the magazine 12.

[0049] Preferably, the pipe receiving chamber 136 of the auxiliary pipe receiving assembly 16 is typically formed by moving the auxiliary pipe receiving assembly and is adapted to receive and support a pipe section 20. In the preferred embodiment, the pipe receiving chamber 136 is a notch or trough shaped opening operatively connectable to the transfer member 17 at a position anywhere on the transfer member 17 between the first end 100 and the second end 102. Alternatively, the pipe receiving chamber 136 may be positionable at the second end 102 of the transfer member 17. The pipe receiving chamber 136 is designed such that the pipe receiving chamber will align with at least one column of pipe 54 within the magazine 12. In the preferred embodiment, the pipe receiving chamber 136 is adapted to receive and support a pipe section 20 when alignment occurs between the receiving chamber 136 and one of the columns 54. It may be noted that in the preferred embodiment, the auxiliary pipe receiving assembly 133 is typically used when the transfer member 17 are moved farthest away from spindle axis 24 so that the pipe receiving chamber 136 of the auxiliary pipe receiving assembly is positioned beyond the outer border 122 of the farthermost magazine column 54 from the spindle axis to the auxiliary pipe receiving area 22 as shown in FIG. 3.

[0050]FIGS. 4a, 4 b and 5 illustrate a preferred embodiment of the lockout system 138 operatively connectable to the pipe receiving chamber 136. In one preferred embodiment, the lockout system 138 is pivotally connectable to the pipe receiving chamber 136 by a pivot pin 150 145. The lockout system 138 pivots about the pivot pin 150 145 between a closed position 146 and an open position 148. More preferably, the lockout system 138 comprises a pin 150 to be inserted through a closed position pin hole 152 or an open position pine hole 154 to lock the lockout system in the respective positions. Alternative structures for operating the lockout system 138 are anticipated. For example, rather than pivoting the lockout system 138 onto the pipe receiving chamber 136 the lockout system may slide laterally between the closed position 146 and the open position 148. In the preferred embodiment, the lockout system 138 comprises an auxiliary blocking member 156. The auxiliary blocking member 156 has an auxiliary oversurface 158 that contacts with the pipe sections 20 when the lockout system 138 is in the closed position 146. The auxiliary oversurface 158 blocks the pipe sections 20 from entering the pipe receiving chamber 136. Additionally, the auxiliary oversurface 158 has a wear protection coating 160 to prevent excessive wear of the auxiliary oversurface.

[0051] With continued reference to FIGS. 2-5, in the preferred embodiment when the lockout system 138 is in the closed position 146, as shown in FIG. 4a, the lockout system blocks the pipe receiving chamber 136 and prevents a pipe section 20 from entering the receiving chamber during normal operation. As long as the lockout system 138 is in the closed position 4 a it will block the column of pipe 54 at any time it is positioned under that column. In the closed position 4 a, the lockout system 138 presents a functionally continuous surface with the oversurface 128 of the pipe blocking member 126 of the transfer members 17 when the lockout system is in the closed position 146. Thus, in the closed position 146, the lockout system 138 works in conjunction with transfer member assembly 17 such that the lockout system functions as the rear most part of the pipe handling assembly 14. Though the lockout system 138 is preferably at the rear of the transfer member 17 to make it easier to add or remove a section of pipe 20, those skilled in the art will appreciate that it could be positioned at alternative locations along the transfer members as discussed earlier.

[0052] With still continued reference to FIGS. 2-5, in the preferred embodiment, when the lockout system 138 is in the open position 148, the lockout system permits a pipe section 20 to be manually placed in the pipe receiving chamber 136. Though the auxiliary pipe receiving assembly 16 is shown to be only for one section of pipe 20, those skilled in the art will appreciate that the pipe receiving chamber 136 could be the width of more than one column 54. This would provide for more that one pipe 20 to be added or removed at a time.

[0053] It may be noted that in the preferred embodiment, when adding or removing a pipe section 20, the transfer members 17 are typically fully retracted away from the spindle axis 24. Though it is only necessary to retract them just beyond the magazine 12. At that point an operator manually moves the lockout system 138 from the closed position 146 in FIG. 4a to the open position 148 as shown in FIG. 4b. This is typically done by removing the pin 150 from the closed position hole 152, and rotating the lockout system 138 from the closed 146 to the open 148 position and inserting the pin 150 in hole 154. Though this is stated as a manual operation to position the lockout system 138, other mechanisms could be used such as a hydraulic cylinder. Once the lockout system 138 is in the open position 148 of FIG. 4b, an operator manually places one section of pipe 20 into the pipe receiving chamber 136. At that point the pipe 20 would be supported on the transfer members 17.

[0054] To align the pipe 20 with the magazine 12 in the preferred embodiment, as illustrated in FIGS. 1 and 2, an axial stop 162 may be used as illustrated in FIGS. 1 and 2. This is preferably attached to the magazine 12 or a magazine mounting frame 28. The axial stop 162 is provided as a mechanical guide for properly aligning the pipe section 20 in the pipe receiving chamber 136 axially with the magazine 12. In the preferred embodiment, the axial stop 162 is mechanical and is either removable or hinged 170 (FIG. 1) to allow it to move out of the way when not in use. Preferably, when a pipe section 20 is in the pipe receiving chamber 136 and properly aligned with the magazine 12, the transfer members 17 can be moved so that the auxiliary pipe receiving assembly 16 is positioned beneath a column 54 in which the pipe section is to be placed.

[0055] In the preferred embodiment, when receiving a pipe section 20 from the horizontal boring machine 18, the transfer members 17 are advanced in direction X to the spindle axis 24. As the transfer members 17 advance, the spring loaded pipe retainer 110 is deflected downward as it contacts the pipe section 20. The pipe holding member 15 is aligned with the pipe section 20 to be received. After alignment with the pipe section 20, the spring 112 returns the pipe retainer 110 to the support position and retains the pipe section in the pipe holding member 15 during transport. The pipe section 20 is unthreaded from the drill string 131 and is supported solely by the pipe holding member 15. The transfer members 17 are then retracted in direction Y for return of the pipe section 20 to the magazine 12. Pipe sections 20 are replaced in the magazine 12 in a manner yet to be described.

[0056] A pipe return assembly 172 or a vertical lift, shown in FIGS. 1 and 6, can then be raised, lifting the pipe section 20 from the pipe receiving chamber 136 of the auxiliary pipe receiving assembly 16 into the magazine 12. This step can be repeated as many times as desired to fill column 54. The transfer members 17 can then be retracted and the lockout system 138 closed so that the pipe handling assembly 14 can resume normal operation with a pipe section 20 now added to the magazine 12. Those skilled in the state of the art will appreciate that pipe sections 20 can be removed from column 54 in the inverse manner described here.

[0057] Turning now to FIGS. 6 and 7, the pipe return assembly 172 for returning pipe sections 20 to the magazine 12 is positioned beneath the lower portion 52 of the magazine 12 and comprises return arms 176, pivot pins 178, a link 180 and a hydraulic cylinder 182. The return arms 176 are attached to the frame 28 by pivot pins 178 and the link 180 connects the hydraulic cylinder 182 to the return arms 176 by pins.

[0058] It may be noted that when returning a pipe section 20 to the magazine 12, the first column 54 that is nearest the spindle axis 24 that is not completely full of pipe sections is selected. The hydraulic cylinder 182 is actuated to extend the link 180 in a direction P. Extension of the link 180 in direction P shifts the return arms 176 thus raising the pipe section 20 into the selected column 54. Actuation of the hydraulic cylinder 182 causes the link 180 to move in direction P. As the link 180 is extended, the return arms 176 shift position causing the uppermost portion of the return arm to raise. Pipe section 20 supported on the return arms 176 is lifted into the selected column 54. The cylinder 182 is then retracted causing link 180 to move in a direction Q. As the link 180 moves in direction Q, the return arms 176 lower. The pipe section 20 in the magazine 12 then rests directly on the transfer members 17. The transfer members 17 may then be extended to the spindle axis 24 to receive another pipe section 20 from the horizontal boring machine 18. This sequence is repeated until the pipe sections 20 from the drill string 131 of the horizontal boring machine 18 are returned to the magazine 12 and the magazine becomes full.

[0059] If additional pipe sections 20 need to be removed from the drill string 131, the column of the magazine 12 nearest the spindle axis 24 is then emptied and subsequently additional columns adjacent the column nearest the spindle axis are emptied. A pipe section 20 is removed from the drill string 131 and transported from the spindle axis 24 to a selected magazine column 54 using the pipe holding member 15. After the pipe section 20 is added to the selected magazine column 54 by the pipe return assembly 172, the auxiliary pipe receiving assembly 16 will then transport the pipe sections 20 from the magazine position 142 wherein the auxiliary pipe receiving assembly is aligned with the discharge opening of the farthermost magazine column 54 from the spindle axis 24 to the auxiliary position 144. In the auxiliary position 144, the auxiliary pipe receiving assembly 16 is at the auxiliary pipe receiving area 22 from where the pipe section 20 may be manually or otherwise unloaded from the pipe receiving chamber 136 as discussed briefly earlier. The pipe receiving chamber 136 is then returned to be positioned under the discharge opening 95 of the farthermost magazine column 54 from the spindle axis 24. The above process is then repeated until all pipe sections 20 are removed from the drill string 131.

[0060] It will now be appreciated that the present invention permits automatic loading and unloading of pipe sections 20 between a horizontal boring machine 18 and the magazine 12 of the pipe handling device 10 to makeup/breakout the drill string 131 and permits manual loading and unloading of additional pipe sections when the magazine is near empty or near full. The additional pipe sections 20 are transported in a generally horizontal position and in ready alignment with the boring machine 18 for immediate connection with the drill string 131.

[0061] Although the present invention has been described with respect to a several specific preferred embodiments thereof, various changes and modifications may be suggested to one skilled in the art, and it is intended that the present invention encompass such changes and modifications as fall within the scope of the appended claims. 

What is claimed:
 1. A pipe handling assembly for use with a horizontal boring machine having a spindle axis and a magazine having a lower portion having a discharge outlet formed therein, the pipe handling assembly comprising: a transfer member having a first end and a second end, the second end being remote from the spindle axis; a pipe holding member operatively connectable to the first end of the transfer member and adapted to transport a pipe section between the discharge opening of the magazine and the spindle axis of the horizontal boring machine; and an auxiliary pipe receiving assembly operatively connectable to the transfer member and adapted to transport a pipe section on a delivery path between a magazine position and an auxiliary position; wherein in the magazine position the auxiliary pipe receiving assembly is positionable at the discharge opening of the magazine column to load and unload a pipe section to and from the magazine column; and wherein in the auxiliary position the auxiliary pipe receiving assembly is positionable beyond an outer border of the magazine remote from the spindle axis to load and unload a pipe section to and from the auxiliary pipe receiving assembly.
 2. The pipe handling assembly of claim 1 wherein the magazine further comprises a plurality of columns within each of which a plurality of pipe sections may be received and stored. 3 The pipe handling assembly of claim 2 wherein the transfer member of the pipe handling assembly further comprises a pipe blocking member between the first end and the second end and wherein the pipe blocking member has an oversurface that contacts with the pipe sections at the lower portion of the magazine columns and selectively blocks the discharge of the pipe sections from the magazine columns.
 4. The pipe handling assembly of claim 3 wherein the oversurface of the blocking member comprises a wear protection coating.
 5. The pipe handling assembly of claim 3 wherein the auxiliary pipe receiving assembly comprises a pipe receiving chamber operatively connectable to the transfer member of the pipe handling assembly and adapted to receive and support a pipe section.
 6. The pipe handling assembly of claim 5 wherein the pipe receiving chamber of the auxiliary pipe receiving assembly is positionable under the discharge opening of a selected magazine column to load and unload a pipe section to and from the magazine column.
 7. The pipe handling assembly of claim 5 wherein the pipe receiving chamber of the auxiliary pipe receiving assembly is positionable beyond the outer border of the magazine column farthermost from the spindle axis to load and unload a pipe section to and from the horizontal boring machine.
 8. The pipe handling assembly of claim 5 wherein the auxiliary pipe receiving assembly further comprises: a lockout system operatively connectable to the pipe receiving chamber and adapted to operate between an open position and a closed position; wherein in the open position the lockout system will permit the pipe receiving chamber to receive and support a pipe section; and wherein in the closed position the lockout system will block the pipe receiving chamber so that the pipe receiving chamber is unable to receive and support the pipe section.
 9. The pipe handling assembly of claim 8 wherein the lockout system is pivotally connectable to the pipe receiving chamber of the auxiliary pipe receiving assembly.
 10. The pipe handling assembly of claim 8 wherein the lockout system is slidably connectable to the pipe receiving chamber of the auxiliary pipe receiving assembly.
 11. The pipe handling assembly of claim 8 wherein the lockout system comprises an auxiliary blocking member, wherein the auxiliary blocking member has an auxiliary oversurface that contacts with the pipe sections when the lockout system is in the closed position and blocks the pipe sections from entering the pipe receiving chamber.
 12. The pipe handling assembly of claim 11 wherein the auxiliary oversurface of the auxiliary blocking member comprises a wear protection coating.
 13. The pipe handling assembly of claim 11 wherein the pipe blocking oversurface and the auxiliary blocking oversurface form a functionally continuous surface with each other when the lockout system is in the closed position.
 14. The pipe handling assembly of claim 6 further comprising an axial stop operatively connectable to the magazine and adapted to provide a mechanical guide for properly aligning the pipe section in the pipe receiving chamber with the discharge opening of the selected magazine column.
 15. The pipe handling assembly of claim 6 further comprising an axial stop operatively connectable to a magazine frame and adapted to provide a mechanical guide for properly aligning the pipe section in the pipe receiving chamber with the discharge opening of the selected magazine column.
 16. The pipe handling assembly of claim 1 wherein the magazine is supportable adjacent a spindle of the boring machine such that the pipe sections stored therein are generally parallel to the spindle axis.
 17. The pipe handling assembly of claim 3 wherein the pipe holding member that is structurally linked to the transfer member.
 18. The pipe handling assembly of claim 17 wherein the pipe holding member must receive a pipe section transported from the auxiliary position to the magazine position by the auxiliary pipe receiving member in order to transport the pipe section from beyond the outer border of the farthermost magazine column to the spindle axis.
 19. The pipe handling assembly of claim 18 wherein the pipe holding member must return a pipe section from the spindle axis to the selected magazine column in order for the auxiliary pipe receiving member to transport the pipe section from the magazine position to the auxiliary position.
 20. The pipe handling assembly of claim 19 wherein the pipe handling assembly further comprises: a rotation member; a hydraulic motor operatively connectable to the rotation member; and at least one gear assembly operatively connectable to the rotation member to drive movement of the transfer member; and wherein the pipe receiving chamber on the transfer member is movable between the magazine position and the auxiliary position.
 21. The pipe handling assembly of claim 20 wherein the gear assembly comprises a rack and pinion gear.
 22. The pipe handling assembly of claim 21 wherein the gear assembly is rotatably movable to drive movement of the pipe receiving chamber on the transfer member between the magazine position and the auxiliary position.
 23. The pipe handling assembly of claim 1 wherein the delivery path of the auxiliary pipe receiving assembly comprises at least one straight line segment.
 24. The pipe handling assembly of claim 1 wherein the transfer member is planar.
 25. The pipe handling assembly of claim 1 wherein the transfer member is arcuate.
 26. The pipe handling assembly of claim 1 wherein the auxiliary pipe receiving assembly is operatively connectable to the transfer member at the second end of the transfer member.
 27. The pipe handling assembly of claim 1 wherein the auxiliary pipe receiving assembly is operatively connectable to the transfer member between the first end and the second end of the transfer member.
 28. A horizontal boring machine system to operate a variable length drill string comprising a plurality of pipe sections, the horizontal boring machine system comprising: a boring machine having a spindle defining a spindle axis; a drive system operatively connectable to the boring machine and supported on a frame to operate the variable length drill string; a pipe handling assembly adapted to add and remove pipe sections from the drill string, the pipe handling assembly comprising: a magazine defining a plurality of columns to store and supply the plurality of pipe sections and having at least one discharge opening through which the pipe sections are released; a transfer member having a first end and a second end and adapted to operatively move pipe sections along a delivery path between the spindle axis and an auxiliary pipe receiving area beyond an outer border of the magazine column farthermost from the spindle axis; a pipe holding member operatively connectable to the first end of the transfer member and adapted to transport a pipe section along the delivery path between the discharge opening of a selected magazine column and the spindle axis; and an auxiliary pipe receiving assembly operatively connectable to the transfer member and adapted to receive and transport a pipe section along the delivery path between the discharge opening of the selected magazine column and the auxiliary pipe receiving area.
 29. The pipe handling assembly of claim 28 wherein the transfer member is planar.
 30. The pipe handling assembly of claim 28 wherein the transfer member is arcuate.
 31. The pipe handling assembly of claim 28 wherein the auxiliary pipe receiving assembly is operatively connectable to the transfer member at the second end of the transfer member.
 32. The pipe handling assembly of claim 28 wherein the auxiliary pipe receiving assembly is operatively connectable to the transfer member between the first end and the second end of the transfer member.
 33. The pipe handling assembly of claim 28 wherein the delivery path of the auxiliary pipe receiving assembly comprises at least one straight line segment.
 34. The pipe handling assembly of claim 28 wherein the transfer member of the pipe handling assembly further comprises a pipe blocking member between the first end and the second end and wherein the pipe blocking member has an oversurface that contacts with the pipe sections at the lower portion of the magazine columns and selectively blocks the discharge of the pipe sections from the magazine columns.
 35. The pipe handling assembly of claim 34 wherein the auxiliary pipe receiving assembly comprises a pipe receiving chamber operatively connectable to the transfer member of the pipe handling assembly and adapted to receive and support a pipe section.
 36. The pipe handling assembly of claim 35 wherein the pipe receiving chamber of the auxiliary pipe receiving assembly is positionable under the discharge opening of a selected magazine column to load and unload a pipe section to and from the magazine column.
 37. The pipe handling assembly of claim 35 wherein the pipe receiving chamber of the auxiliary pipe receiving assembly is positionable beyond the outer border of the magazine column farthermost from the spindle axis to load and unload a pipe section to and from the horizontal boring machine.
 38. The pipe handling assembly of claim 35 wherein the auxiliary pipe receiving assembly further comprises: a lockout system operatively connectable to the pipe receiving chamber and adapted to operate between an open position and a closed position; wherein in the open position the lockout system will permit the pipe receiving chamber to receive and support a pipe section; and wherein in the closed position the lockout system will block the pipe receiving chamber so that the pipe receiving chamber is unable to receive and support the pipe section.
 39. The pipe handling assembly of claim 38 wherein the lockout system comprises an auxiliary blocking member, wherein the auxiliary blocking member has an auxiliary oversurface that contacts with the pipe sections when the lockout system is in the closed position and blocks the pipe sections from entering the pipe receiving chamber.
 40. The pipe handling assembly of claim 39 wherein the pipe blocking oversurface and the auxiliary blocking oversurface form a functionally continuous surface with each other when the lockout system is in the closed position.
 41. The pipe handling assembly of claim 36 further comprising an axial stop operatively connectable to the magazine and adapted to provide a mechanical guide for properly aligning the pipe section in the pipe receiving chamber with the discharge opening of the selected magazine column.
 42. The pipe handling assembly of claim 36 further comprising an axial stop operatively connectable to a magazine frame and adapted to provide a mechanical guide for properly aligning the pipe section in the pipe receiving chamber with the discharge opening of the selected magazine column.
 43. The pipe handling assembly of claim 28 wherein the pipe holding member must receive a pipe section transported from the auxiliary position to the magazine position by the auxiliary pipe receiving member in order to transport the pipe section from beyond the outer border of the farthermost magazine column to the spindle axis.
 44. The pipe handling assembly of claim 28 wherein the pipe holding member must return a pipe section from the spindle axis to the selected magazine column in order for the auxiliary pipe receiving member to transport the pipe section from the magazine position to the auxiliary position.
 45. A method for handling a plurality of pipe sections to make-up/break-out a drill string at a boring site with a horizontal boring system having a spindle axis and a pipe handling assembly, the method comprising: storing the plurality of pipe sections in plural columns of a multiple-column magazine; discharging a single pipe section from a magazine column nearest the spindle axis and transporting that pipe section to the spindle axis by a pipe holding member operatively connectable to a first end of a transfer member of the pipe handling assembly; adding the transported pipe section to the drill string of a horizontal boring machine; repeating the preceding two steps until all pipe sections have been emptied from the magazine column nearest the spindle axis; repeating the preceding three steps with one or more additional magazine columns, with the sequence by which columns are emptied defining a column emptying order from the column nearest the spindle axis to the column farthermost from the spindle axis; adding a pipe section to a selected magazine column from an auxiliary pipe receiving area beyond an outer border of the farthermost magazine column by an auxiliary pipe receiving assembly operatively connectable to the transfer member of the pipe handling assembly; transporting the pipe section added to the selected magazine column by the auxiliary pipe receiving assembly to the spindle axis using the pipe holding member at the first end of the transfer member; repeating the preceding two steps until all the required pipe sections are added to the drill string; removing a pipe section from the drill string of the horizontal boring machine; transporting the removed single pipe section from the spindle axis to the magazine column which is last in the column emptying order, and storing that pipe section in that column; repeating the preceding two steps until all pipe sections which had been removed from the last column in the column emptying order have been replaced; repeating the preceding three steps with one or more additional columns, with the sequence in which columns are refilled defining a sequence which is the reverse of the column emptying order; emptying the pipe sections from the magazine column closest to the spindle axis; repeating the preceding step until desired number of magazine columns are empty; removing a pipe section from the drill string of the horizontal boring machine; transporting the removed single pipe section from the spindle axis to a selected magazine column using the pipe holding member; transporting the pipe section from the selected magazine column to the auxiliary pipe receiving area using the auxiliary pipe receiving assembly; and repeating the preceding three steps until all pipe sections are removed from the drill string. 